2024-02-29T15:12:18.614

NotApplicable

2024-02-29T15:49:14.733

This dive is to get the hyperspectral system wet so that any potential connection and other problems can be addressed before the next dive. This dive will occur at WP3 of the mapping plan on the SW flank of the seamount. Dive depth will be around 30-50 meters.

2024-03-01T10:53:05.213

NotApplicable

2024-03-01T12:28:40.446

This transect is located on the southern flank of the seamount “Mayday” (SyGR1; -25.1783, -90.2087), our first seamount of this cruise. The dive will start at ~1125 m depth and go upslope to the summit plateau at ~ 390 m. This seamount is a guyot located along the eastern extent of the Salas y Gómez Ridge where we expect the nutrient concentrations to be higher than many of the seamounts west of this seamount.

2024-03-01T13:12:52.068

NotApplicable

2024-03-02T02:11:09.577

This transect is located on the southern flank of the seamount “Mayday” (SyGR1; -25.1783, -90.2087), our first seamount of this cruise. The dive will start at ~1125 m depth and go upslope to the summit plateau at ~ 390 m. This seamount is a guyot located along the eastern extent of the Salas y Gómez Ridge where we expect the nutrient concentrations to be higher than many of the seamounts west of this seamount.

2024-03-02T04:39:29.651

NotApplicable

2024-03-02T13:09:49.995

This transect is located on the southern flank of the seamount “Mayday” (SyGR1; -25.1783, -90.2087), our first seamount of this cruise. The dive will start at ~1200 m depth and go upslope to the regional summit at ~490 m. This seamount is a guyot located along the eastern extent of the Salas y Gómez Ridge where we expect the nutrient concentrations in the surface waters to be higher than many of the seamounts west of this seamount.

2024-03-04T02:14:48.23

NotApplicable

2024-03-04T13:29:01.156

This transect is located on the western flank of an unnamed and unexplored seamount (SyGR2; -25.63, -94.60), our second seamount of this cruise. The dive will start at ~1000 m depth and go upslope to the summit plateau at ~650 m. This seamount is a guyot located along the central region of the Salas y Gómez Ridge where we expect the nutrient concentrations to be lower than our first seamount but higher than many of the seamounts west of this seamount. Prior to this expedition, we only had conducted a single multi-beam pass over the seamount on another research cruise.

2024-03-04T16:06:14.75

NotApplicable

2024-03-05T01:23:55.108

Part 2 of previous dive: this transect is located on the western flank of an unnamed and unexplored seamount (SyGR2; - 25.63, -94.60), our second seamount of this cruise. The dive will start at ~1350 m depth and go upslope to ~1000 m. This seamount is a guyot located along the central region of the Salas y Gómez Ridge where we expect the nutrient concentrations to be lower than our first seamount but higher than many of the seamounts west of this seamount. Prior to this expedition, we only had conducted a single multi-beam pass over the seamount on another research cruise.

2024-03-06T17:58:46.905

NotApplicable

2024-03-07T05:43:44.014

This transect is located on the western flank of an unnamed seamount (SyGR3; -25.57, -98.98), our third seamount of this cruise. The dive will start at ~1000 m depth and go upslope to the a plateau at ~900 m, where we will move along the platform edge. This seamount is a guyot located along the central region of the Salas y Gómez Ridge where we expect the nutrient concentrations to be lower than our first two seamounts but higher than many of the seamounts west of this seamount. Prior to this expedition, we only had conducted a single multi-beam pass over the seamount on another research cruise.

2024-03-07T21:19:34.718

NotApplicable

2024-03-07T23:49:30.271

Dive to simply recover the amphipod traps.

2024-03-08T19:44:26.503

NotApplicable

2024-03-09T06:59:34.83

This transect is located on the eastern flank of an unregistered seamount “Rock” (SyGR4; 25.76 -100.61), our fourth seamount of this cruise. The dive will start at ~1000 m depth and go upslope to the a plateau at ~500 m. This seamount is a guyot located along the central region of the Salas y Gómez Ridge where we expect the nutrient concentrations to be lower than our first three seamounts but higher than many of the seamounts west of this seamount. Prior to this expedition, we only had conducted a single multi-beam pass over the seamount on another research cruise and a prior study conducted a trawl.

2024-03-09T09:33:39.702

NotApplicable

2024-03-09T20:33:07.462

This transect is located on the eastern flank of an unregistered seamount “Rock” (SyGR4; 25.76 -100.61), our fourth seamount of this cruise. The dive will start at ~1400 m depth and go upslope to ~1000 m. This seamount is a guyot located along the central region of the Salas y Gómez Ridge where we expect the nutrient concentrations to be lower than our first three seamounts but higher than many of the seamounts west of this seamount. Prior to this expedition, we only had conducted a single multi-beam pass over the seamount on another research cruise and a prior study conducted a trawl. Upon reaching bottom, collect a Niskin bottle (#1). Then proceed upslope along (or roughly parallel to) the transect path to the next WP while surveying and collecting samples as indicated by science leads. Niskin bottles should be collected in and near areas of coral gardens, one bottle per location. At an area of interest to Giancarlo, conduct ~30 minutes of survey with hyperspectral camera system; if time permits, conduct a second survey in a second location. If a cluster of squat lobsters is observed, suction at least 5 in good condition unless Mary indicates they are not needed. Target is a ~11.5-hour dive deck-to-deck and to make it to WP10. Prior to leaving last waypoint to head toward amphipod traps, take a Niskin bottle if one is still available.

2024-03-12T08:14:37.623

NotApplicable

2024-03-12T18:17:07.751

This transect is located on the northeastern flank Rapa Nui, which is the southeasternmost island of the Polynesian triangle. The dive will start at ~850 m depth and go upslope to ~350-450 m. This island is located near the western extent of the Salas y Gómez Ridge where we expect the nutrient concentrations to be among the lowest but with an increase associated with the terrestrial input from the island.

2024-03-12T23:57:59.417

NotApplicable

2024-03-13T10:23:53

This transect is located on the northern flank Rapa Nui, which is the southeasternmost island of the Polynesian triangle. The dive will start at ~820 m depth and go upslope to ~250-300 m. This island is located near the western extent of the Salas y Gómez Ridge where we expect the nutrient concentrations to be among the lowest but with an increase associated with the terrestrial input from the island.

2024-03-14T07:48:42.271

NotApplicable

2024-03-14T21:20:22.933

This transect is located on the southwestern flank Rapa Nui, which is the southeasternmost island of the Polynesian triangle. The dive will start at ~600 m depth and go upslope to ~200-300 m. This island is located near the western extent of the Salas y Gómez Ridge where we expect the nutrient concentrations to be among the lowest but with an increase associated with the terrestrial input from the island. Upon reaching bottom, move towards WP01 and collect a Niskin bottle (#1) and start transecting. We will not take push cores or deploy amphipod traps. Then proceed upslope along the transect or parallel to transect to survey and collect samples as indicated by science leads. Niskin bottles should be collected in and near areas of coral gardens, one bottle per location. At an area of interest to Hyperspectral team, conduct ~30 minutes of survey with hyperspectral camera system. Squat lobster collection for experiments will also not be prioritized on this deployment due to time limitations; they will be collected only for biodiversity surveys. Target is a ~12-hour dive deck-to-deck. Within 15 minutes or so prior to leaving bottom, take a Niskin bottle if one is still available.

2024-03-15T02:14:16.964

NotApplicable

2024-03-15T11:52:11.835

This transect is located on the western side of the seamount Moai, which is ~26 km west of Rapa Nui, the southeasternmost island of the Polynesian triangle. The dive will start at ~900 m depth and go upslope to the summit at ~600 m. This seamount is located near the western extent of the Salas y Gómez Ridge where we expect the nutrient concentrations to be among the lowest but with an increase associated with the terrestrial input from the island.

2024-03-15T23:38:02.111

NotApplicable

2024-03-16T08:44:12.542

This transect is located on the northeastern flank of seamount Pukao, which is our westernmost station located ~86 km west of Rapa Nui, the southeasternmost island of the Polynesian triangle. The dive will start at ~800 m depth and go upslope to the summit plateau at ~280 m. This seamount is located near the western extent of the Salas y Gómez Ridge where we expect the nutrient concentrations to be among the lowest.

2024-03-16T10:28:23.429

NotApplicable

2024-03-16T20:09:26.652

This transect is located on the northeastern flank of seamount Pukao, which is our westernmost station located ~86 km west of Rapa Nui, the southeasternmost island of the Polynesian triangle. The dive will start at ~800 m depth and go upslope to the summit plateau at ~280 m. This seamount is located near the western extent of the Salas y Gómez Ridge where we expect the nutrient concentrations to be among the lowest. Upon reaching bottom, move towards WP01, recover the amphipod traps and collect a Niskin bottle (#1). Then proceed upslope along the transect or parallel to transect to survey and collect samples as indicated by science leads. Niskin bottles should be collected in and near areas of coral gardens, one bottle per location. At an area of interest to Hyperspectral team, conduct ~30 minutes of survey with hyperspectral camera system. Squat lobster collection for experiments are again a priority if a group of them are observed; need 4-6 in good condition. Target is a ~11-hour dive deck-to-deck. Within 15 minutes or so prior to leaving bottom, take a Niskin bottle if one is still available.

2024-03-16T22:00:38.042

NotApplicable

2024-03-17T07:03:37.481

This transect is located on the summit of seamount Pukao, which is our westernmost station located ~86 km west of Rapa Nui, the southeasternmost island of the Polynesian triangle. The dive will start at ~200 m depth and go upslope to the summit at ~150 m. This seamount is located near the western extent of the Salas y Gómez Ridge where we expect the nutrient concentrations to be among the lowest.

2024-03-18T11:36:04.404

NotApplicable

2024-03-18T23:16:31.654

This transect is located on the western flank of an unnamed and unexplored guyot located between Rapa Nui and Motu Motiro Hiva, the only two islands along the Salas y Gómez Ridge and the south westernmost points of the Polynesian triangle. The dive will start at ~800 m depth and go upslope to the summit plateau at ~330 m. This seamount is located near the western extent of the Salas y Gómez Ridge where we expect the nutrient concentrations to be among the lowest.

2024-03-19T00:49:49.936

NotApplicable

2024-03-19T06:53:27.569

This transect is located on the western flank of an unnamed and unexplored guyot located between Rapa Nui and Motu Motiro Hiva, the only two islands along the Salas y Gómez Ridge and the southwesternmost points of the Polynesian triangle. The dive will start at ~800 m depth and go upslope to a local summit at ~550 m. This seamount is located near the western extent of the Salas y Gómez Ridge where we expect the nutrient concentrations to be among the lowest. Upon reaching bottom, move towards WP01, recover the amphipod traps and collect a Niskin bottle (#1). Then proceed upslope along the transect or parallel to transect to survey and collect samples as indicated by science leads. Science leads – please alternate between 5 minute transects with no collections (may zoom without stopping) and meandering transects with sampling. Niskin bottles should be collected in and near areas of coral gardens, one bottle per location. Squat lobster collection for experiments is again a priority if a group of them are observed; need 4-6 in good condition. Target is a ~8-hour dive deck-to-deck. Within 15 minutes or so prior to leaving bottom, take a Niskin bottle if one is still available.

2024-03-20T02:15:57.803

NotApplicable

2024-03-20T15:21:14.135

This transect is located on the southeastern flank of Motu Motiro Hiva, un uninhabited island that serves as a nesting ground for some seabirds and is one of the only two islands along the Salas y Gómez Ridge. Motu Motiro Hiva is surrounded by the shallow coral reefs that are considered the southwesternmost reefs of the Polynesian triangle. The dive will start at ~800 m depth and go upslope to a plateau at ~200 m. This island is located near the western extent of the Salas y Gómez Ridge where we expect the nutrient concentrations to be among the lowest.

2024-03-20T17:41:01.109

NotApplicable

2024-03-21T04:28:41.868

This transect is located on the northern flank of Motu Motiro Hiva, un uninhabited island that serves as a nesting ground for some seabirds and one of the only two islands along the Salas y Gómez Ridge. Motu Motiro Hiva is surrounded by the southwesternmost shallow coral reefs of the Polynesian triangle. The dive will start at ~1200 m depth and go upslope to a plateau at ~800 m. This island is located near the western extent of the Salas y Gómez Ridge where we expect the nutrient concentrations to be among the lowest.

2024-03-21T23:38:58.765

NotApplicable

2024-03-22T11:30:22

This transect is located on the southeastern flank of an unexplored and unnamed seamount that is located within the national jurisdiction of Chile, east of Motu Motiro Hiva, un uninhabited island that serves as a nesting ground for some seabirds and is one of the only two islands along the Salas y Gómez Ridge. The dive will start at ~800 m depth and go upslope to a plateau at ~200 m. This island is located near the western-central extent of the Salas y Gómez Ridge where we expect the nutrient concentrations to be among the lowest. Upon reaching bottom, move towards WP01, deploy the amphipod traps and collect a Niskin bottle (#1). Then proceed upslope along the transect or parallel to transect to survey and collect samples as indicated by science leads. Science leads – please alternate between 5 minute transects with no collections (may zoom without stopping) and meandering transects with sampling. At first decent sedimented area, take 8 push cores (likely at or near WP01) and a Niskin bottle (do not take 2 if at WP01). We need 8 good push cores, 3 with >20 cm of sediment and the others with >10 cm of sediment, all with sediment layering intact. Niskin bottles should be collected in and near areas of coral gardens, one bottle per location. Squat lobster collection for experiments is again a priority if a group of them are observed; need 4-6 in good condition. Target is a ~12-hour dive deck-to-deck. Within 15 minutes or so prior to leaving bottom, take a Niskin bottle if one is still available. If dive is extended to reach ~200 m, then time is lost off subsequent dive.

2024-03-22T13:30:33.487

NotApplicable

2024-03-22T21:27:50.464

This transect is located on the southeastern flank of an unexplored and unnamed seamount that is located within the national jurisdiction of Chile, east of Motu Motiro Hiva, un uninhabited island that serves as a nesting ground for some seabirds and is one of the only two islands along the Salas y Gómez Ridge. The dive will start at ~800 m depth and go upslope to ~270 m. This island is located near the western-central extent of the Salas y Gómez Ridge where we expect the nutrient concentrations to be among the lowest.

2024-03-23T09:56:53.096

NotApplicable

2024-03-23T22:55:28.918

This transect is located on the southeastern flank of a seamount that is located within the national jurisdiction of Chile, east of Motu Motiro Hiva, un uninhabited island that serves as a nesting ground for some seabirds and is one of the only two islands along the Salas y Gómez Ridge. The seamount also lies within the Motu Motiro Hiva Marine Park and was previously explored only by a towed camera system. The dive will start at ~670 m depth and go upslope to the summit ~260 m. This seamount is located near the western-central extent of the Salas y Gómez Ridge where we expect the nutrient concentrations to be among the lowest.

2024-03-24T01:20:27.605

NotApplicable

2024-03-24T10:46:15.534

This transect is located on the southeastern flank of a seamount that is located within the national jurisdiction of Chile, east of Motu Motiro Hiva, un uninhabited island that serves as a nesting ground for some seabirds and is one of the only two islands along the Salas y Gómez Ridge. The seamount also lies within the Motu Motiro Hiva Marine Park and was previously explored only by a towed camera system. The dive will start at ~840 m depth and go upslope to the summit ~560 m. This seamount is located near the western-central extent of the Salas y Gómez Ridge where we expect the nutrient concentrations to be among the lowest. Upon reaching bottom, move towards WP01, collect a Niskin bottle (#1). Then proceed upslope along the transect or parallel to transect to survey and collect samples as indicated by science leads. Science leads – please alternate between 5 minute transects with no collections (may zoom without stopping) and meandering transects with sampling. Niskin bottles should be collected in and near areas of coral gardens, one bottle per location. Squat lobster collection for experiments is again a priority if a group of them are observed; need 4-6 in good condition. Target is an ~11-hour dive deck-to-deck. Within 15 minutes or so prior to leaving bottom, take a Niskin bottle if one is still available. Must make it to amphipod traps 15 minute before off-bottom time to recover them.

2024-03-25T06:42:26.918

NotApplicable

2024-03-25T21:31:39.25

This transect is located on the eastern flank of an unexplored and unregistered seamount that is located within the national jurisdiction of Chile, east of Motu Motiro Hiva, un uninhabited island that serves as a nesting ground for some seabirds and is one of the only two islands along the Salas y Gómez Ridge. The seamount also lies within the Motu Motiro Hiva Marine Park. The dive will start at ~670 m depth and go upslope to the summit ~260 m. This seamount is located near the western-central extent of the Salas y Gómez Ridge where we expect the nutrient concentrations to be among the lowest.